I thought this was a finished game when I bought it, but it really sucks! Cant even climb the sand pass grade on the Fully Fueled scenario at full power, and Yes engines are coupled (well according to the meager instructions given) have lead unit on single , gen on, comm on and freight selected. Rear engines gen on set as Mu6 (i think) not lead and freight, I just uncoupled 2/3rds of the train to be able to move again. Oh and had to wait 15 minutes for signal to change earlier on in this mission which is now going for over 2 hours!!! will see what happens if and when I reach the stop location missing a good part of my train LOL They need not send me any more ad's to buy additional products from them if this is how it works!
Unfortunately a lot of scenarios are bugged or unrealistic. You'd do better to use Quick Drive and the F4 HUD to get a feel for the sim
You are in the wrong forum, you want the TSW2 forum, not the Train Simulator forum. https://forums.dovetailgames.com/forums/technical-reports.80/